查询词典 diffusing

Through the analysis of De, an alternative mechanism interpreting of the"overshoot"phenomena can be obtained: when the diffusing time of small molecular penetrants is shorter than relaxation time of the involved polymer, small molecular substance penetrates into the polymer quickly and its concentration reached a maximum, then the swelling of the polymer by the small molecules makes the chain structure of the polymer relaxed, thus the free volume in polymer matrix, which is occupied by small molecule, decreased, and will squeeze part of the small molecular substance out of the polymer, and therefore overshoot behavior can be observed.

通过对De的分析，可以得出产生&超调&现象的机理的另一种解释：小分子渗透物质的扩散时间相对于聚合物的松弛时间要短（相当于有个更快的扩散速度），所以小分子迅速扩散进聚合物中达到一个极值，由于小分子物质对聚合物的溶胀，使得聚合物链结构产生松弛，由于聚合物链结构的变化，小分子物质占有的自由体积会减小，这样会挤出小分子物质，使得小分子物质在聚合物中的浓度减小，如果高聚物粘弹性明显，甚至可能出现多个浓度的衰减振荡并达到平衡值。

This new method mainly comprises three steps: firstly, normalize the point-gradient vectors and calculate the block-gradient vectors and the corresponding block-coherence; then detect the noisy areas to eliminate the side effect of noise diffusing; finally, re-estimate all block- gradient vectors based on iteration and transform the gradient field to orientation field.

提出了一种基于梯度的健壮的指纹方向场估计算法，新算法首先归一化点梯度向量并计算块梯度向量及相应的块一致性；然后估计噪声区域；最后采用基于迭代的方法，重新估计所有块梯度向量并将梯度向量场转化为方向场。

METHODS: 40 cases were classified stage IV with lumen obstruction after they failed all other treatment regimens. PDT was performed witn 630nm light delivered through cylinder diffusing tip quartz fibers passed through the biopsy channel of a flexible endoscope 48h after intravenous injection of the photosensitizer photofrin. PDT endoscopy was repeated and necrotic tissue was mechanically removed and, if necessary, that site or other new sites were treated after 48 hours. Two days after this another endoscopy was performed and the necrotic tissue was mechanically removed. Endoscopy was repeated one month after PDT and periodically thereafter as needed to re-treat symptomatic residual tumor.

40例肿瘤患者均属于IV期，所有患者都经过化疗、放疗或其他方法治疗无法解除腔道梗阻或不完全梗阻，部分完全梗阻患者结合其他治疗手段解除梗阻，光敏剂为photofrin，按2mg/kg体重静脉滴注，48小时后经内镜导入光导纤维给以630nm（DIOMED半导体激光治疗机）的激光照射，2天后经内镜清除坏死组织并对原有病灶和新发现病灶给以复照，之后根据具体情况给患者的病灶部位清除坏死组织。

Diffusion mechanism,microstructure and optical properties of Ag/Si multilayerson annealing have been investigated by in situ X-ray diffraction,high-resolutiontransmission electron microscopy and UV-VIS-NIR spectrophotometer,Siliconatoms diffusing along silver grain boundaries is suggested as the main diffusionmechanism.

采用原位X—射线衍射、高分辨透射电镜截面观察和光吸收谱测试等手段研究了退火过程中Ag/Si多层膜的扩散、结构演变及光学性质变化，并与可固溶性金属/Si系多层膜进行了比较。揭示了Si原子沿Ag晶界的扩散为主要的扩散机制。

Moreover, Lagrange trail method was used to get the powder diffusion contour at different time, then the whole process was described including powder particle jumpstarting, dispersing with the air and steady diffusing.

利用Lagrange迹点跟踪法，得出颗粒物从吹起到随气流运动直至稳定扩散的全过程中各时刻污染颗粒在大气中的扩散云图。

Definite conditions are quite essential to constructivism teaching: Students should be the active structuralists in acquiring knowledge; they should have strong expectations for study, the ability of criticism, systematic and diffusing thinking ability, organic knowledge structure, the ability to manage the process of study and team spirit; the teacher should be the advanced companion for students in their acquisition of knowledge, master the strategies of the structural teaching, possess a democratic cons...

建构主义教学必须具备一定的条件：学生应成为知识的主动建构者，要具有强烈的学习期待，批判性、系统性、发散性思维的能力，有机的知识结构，管理学习过程的能力以及必要的团队精神；教师应成为学生建构知识的高级伙伴，掌握建构性教学的策略，要有民主的师生关系意识，宽广深厚的知识和高超的教学艺术。建构主义教学的环境应是学生建构知识的平台，因此要具备网络化的学习场所、文本化的教材、学习共同体式的班集体等要素。

Traditional theory of chemical diffusion in solid states can not describe the relation of diffusion fluxes and diffusion-induced stresses because the research subject of the traditional theory is the diffusing atom or atomic flux, not the volume unit in the interdiffusion field.

传统固体化学扩散理论的研究对象是扩散的原子或原子流，并不关心互扩散区域内微观体积单元的变化，因此无法描述原子扩散流与应力之间的关系。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失